Philips PM 3210 Manuale utente

PHILIPS

Operating

manual

PM3210

MHz

Duai-trace

oscilloscope

IMPORTANT

correspondence

concerning

this

apparatus,

please

quote

the

type

number

and

serial

number

given

the

type

plate

the

bottom

the

apparatus.

(©)

N.V.

PHILIPS’

GLOEILAMPENFABRIEKEN

EINDHOVEN

THE

NETHERLANDS

1970

TABLE

CONTENTS

GENERAL

INFORMATION

Introduction

Il.

Technical

data

Il.

Description

the

block

diagram

DIRECTIONS

FOR

USE

IV.

Installation

Mains

adjustment

and

fuses

Earthing

Switching

Operating

instructions

Controls

and

sockets

Preliminary

settings

LIST

FIGURES

Fig.

General

view

Fig.2

Block

diagram

Fig.

Controls

and

sockets,

front

Fig.4

Sockets,

rear

Fig.5

Peak-to-peak

voltage

measurements

Fig.6

Instantaneous

voltage

measurements

Fig.

Time

measurements

Fig.

Rise

time

measurements

Fig.9

Phase

measurements,

method

Fig.

Frequency

measurements

Fig.

Using

the

output

signal

Fig.

Adjusting

elements

Fig.

Adjusting

elements

Fig.

14.

Adjusting

elements

The

inputs

and

their

possibilities

measurements

Influence

the

AC-0-DC

switch

Triggering

General

Trigger

coupling

Automatic

triggering

Trigger

level

External

triggering

Magnifier

Z-Modulation

VI.

Applications

Voltage

measurements

Time

and

frequency

measurements

Phase

measurements

output

signal

VII.

Brief

checking

procedure

GENERAL

INFORMATION

This

section

the

instruction

manual

deals

with

introductory

material

and

basic

information

interest

both

operating

and

servicing

personnel.

includes

specifications

physical

and

electrical

data

and

description

the

operating

principles

the

instrument

block

diagram

level.

The

three

chapters

found

this

section

are:

INTRODUCTION

Il.

TECHNICAL

DATA

Il.

DESCRIPTION

THE

BLOCK

DIAGRAM

Fig.

General

view

Introduction

The

3210

dual-trace

oscilloscope

with

band-

width

MHz

maximum

sensitivity

mV/cm.

The

built-in

electronic

switch

provides

great

number

operating

modes:

CHANNEL

CHOPPED,

ALTERNATE,

ADDED

and

XY.

The

mode

with

the

same

high

sensitivity

for

the

and

channels,

together

with

bandwidth

MHz

and

phase

difference

less

than

2°

between

the

channels,

makes

this

instrument

very

useful

for

colour-television

measurements.

The

mechanical

construction

the

instrument

shows

building-brick

system

that

ensures

extremely

quick

and

efficient

service.

ll.

Technical

data

AXIS

Two

identical

amplifier

channels

and

The

polarity

both

channels

can

inverted.

Bandwidth

DC:

...

MHz

(—3

dB)

AC:

...

MHz

(—3

dB)

Rise

time

Deflection

coefficients

calibrated

ranges

from

mV/cm

V/cm

1-2—5

sequence.

vernier

provides

uncalibrated,

continuous

control

between

the

ranges.

Measuring

accuracy

+3%

Overshoot

(in

position

mV/cm

the

input

attenuator)

less

than

°%/o

for

pulses

with

rise

time

and

trace

height

Input

impedance

MQ//15

Input

time

with

a.c.

coupling

100

Maximum

input

voltage

500

(d.c.

a.c.

peak)

Maximum

deflection

for

sine-wave

signals

with

frequencies

MHz,

the

vertical

deflection

undistorted

for

total

amplitude

equivalent

cm.

With

the

aid

the

shift

controls,

the

peaks

such

signal

can

displayed.

Signal

delay

time

for

each

channel:

150

visible

delay

220ns

D.C.

drift

maximum

sensitivity

cm/hour

constant

ambient

temperature

of 25

°C

(77

OF)

Display

modes

—

channel

only

—

channels

and

chopped,

the

display

time

for

each

channel

being

pus

—

channels

and

alternate

—

channels

and

algebraically

added.

Using

the

polarity

inversion

both

channels,

the

following

displays

are

possible:

A+B,

A-B,

B—A,

—B—-A.

Common

mode

rejection

factor:

100

(from

MHz,

after

adjustment

GAIN

ADJ.)

Maximum

signal

per

channel:

24x

attenuator

setting

—

X-Y

operation.

Channel

forms

the

horizontal

channel

Bandwidth:

...

MHz

with

phase

difference

2°

maximun

between

the

channels.

Maximum

deflection

direction:

for

sine-wave

signals

with

frequencies

MHz.

—

channel

only

signal

output

approximately

200

mV/cm.

The

output

protected

against

short-circuis

CALIBRATION

Calibration

voltage

%o,

square

wave

Frequency

approximately

2.5

kHz

TIME

AXIS

Time

coefficients

Measuring

accuracy

Magnifier

Time-base

output

TRIGGERING

Trigger

system

Trigger

source

Trigger

slope

Trigger

coupling

Trigger

sensitivity

and

bandwidth

Hz—10

0.5

cm!

0.5

Input

impedance

the

external

trigger

input

Maximum

input

voltage

Level

range

(measured

with

kHz

signal

and

continuous

attenuator

position

CAL)

C.R.T.

Type

Use

ful

screen

area

Graticule

Total

acceleration

voltage

Hz—10

kHz

calibrated

ranges

from

100

ns/cm

0.5

s/em

1-2—5

sequence.

vernier

provides

uncalibrated,

continuous

contro!

between

the

ranges.

+3%

(50

cm).

Any

the

expanded

sweep

can

displayed.

The

maximum

effective

time

coefficient

ns/cm.

The

measuring

accuracy

with

expanded

sweep

(measured

between

and

the

time-base

sweep).

sawtooth

voltage.

The

output

protected

against

short-circuits.

Output

resistance:

Load:

With

RJgad

and

Cjgad

100

pF,

the

deviation

the

time

coefficient

less

than

the

time-base

generator

operates

the

triggered

mode

when

input

signal

applied.

auto-circuit

can

switched

provide

time-base

line

the

absence

input

signal.

channel

external

source

or—

position

LEVEL

position

AUTO

Hz...

MHz

:10

Hz...

MHz

HF:

kHz...

MHz

kHz...

MHz

:10

Hz...

kHz

:10

Hz...

kHz

kHz-5

MHz

MHz—15

MHz

MHz—25

MHz

1MQ//40

500

(d.c.

a.c.

peak)

—

internal

level

than

~—

internalauto

approximately

—

external

level

than

Vp-p

—

external

auto

approximately

1.5

Vp-p

D14—120GH

with

medium-short

persistence

phosphor

8cmx

10cm

external,

with

cm-divisions

10kV

Instruments

fitted

with

GM-tube

with

long

persistence

phosphor

are

available

under

type

number

3210G.

Z-MODULATION

Internal

unblanking

time-base

generator.

position

CHOPPED

the

beam

suppressed

during

switching.

External

D.C.

coupled

Required

voltage

Vp-p

(50

Vp-p

maximum)

Short-term

overload

500

Vp-p

maximum

Input

impedance

approximately

kQ.//20

Bandwidth

Hz...

MHz

SUPPLY

PART

Mains

voltages

110

125

145

200

220

245

Mains

frequency

46-400

Power

consumption

Influence

mains

voltage

fluctuations

nil

ENVIRONMENTAL

CONDITIONS

The

instrument

can

used

either

horizontal

vertical

position.

Temperature

range

Operating

within

specification

0...

+45

°C

Operating

-10...

+55

°C

Storage

—40

...

+70

°C

The

instrument

meets

the

VDE

0875

Stérgrad

requirement.

OVERALL

DIMENSIONS

AND

WEIGHT

Height

Width

:30

Depth

47.5

Weight

Properties

expressed

numerical

values

with

tolerances

stated

are

guaranteed

the

factory.

Numerical

values

without

tolerances

stated

represent

the

properties

average

instrument

and

merely

serve

guide.

All

data

apply

cae

nominal

mains

voltage

unless

otherwise

stated.

OPTIONAL

ACCESSORIES

(The

standard

accessories

supplied

with

the

instrument

have

been

listed

Chapter

IV.

INSTALLATION.)

—

Passive

probe

with

1.15

cable

9326

—

Passive

probe

with

cable

9327

—

Passive

h.f.

probe

9350

—

Polaroid

oscilloscope

camera

9380

—

Adapter

for

camera

9378

—

Supplementary

lens

9373

—

Rack-mount

kit

9361

—

Trolley

9395

Ill.

Description

the

block

diagram

Y-AXIS

input

signal

applied

socket

fed

unit

These

units

are

identical

and

contain

the

following

circuits:

input

step-attenuator,

protection

circuit,

pre-amplifier

and

drift-compen-

sation

circuit,

the

continuous

attenuator

and

the

gain

pre-set

control.

The

protection

circuit

prevents

damage

the

input

field-effecttransistors

too

high

input

voltage.

The

drift-reduction

circuit

reduces

the

drift

inherent

the

high

sensitivity

the

amplifier.

Via

the

delay

line

the

signal

fed

the

intermediate

amplifier

printed-wiring

card

Printed-wiring

card

comprises

four

main

parts:

intermediate

amplifier

receiving

the

signal

from

the

pre-amplifier

channel

anidentical

amplifier

for

channel

These

two

ampli-

fiers

are

equipped

with

shift

and

polarity

controls.

the

diode

switch,

which

controlled

the

switch-

driver

circuit.

the

output

amplifier

that

feeds

the

signal

the

vertical-deflection

plates.

TRIGGERING

The

triggering

signal

from

the

pre-amplifier

channel

from

external

source

can

start

the

time-base

generator

(unit

3).

TIME

BASE

The

time-base

unit

provided

with

optional

auto-

circuit

that

makes

the

time-base

generator

free-running

when

there

triggering

signal.

The

time-base

unit

supplies

the

following

output

vol

tages:

sawtooth

voltage.

Via

the

printed-wiring

board

this

sawtooth

voltage

fed

the

X-amplifier

unit

and

toa

socket

the

rear

panel

the

instrument.

gate

pulse

which

fed

combination

unit

via

the

printed-wiring

board.

This

gate

pulse

controls

the

unblanking

the

c.r.t.

during

the

sweep.

analternate

pulse.

This

pulse

controls

the

switch

driver

unit

which

its

turn

controls

the

diode

switches.

X-AXIS

The

amplifier

consists

three

parts:

the

time-base

amplifier.

This

amplifier

feeds

the

saw-

tooth

voltage

from

time-base

unit

symmetrical

and

amplified

to:

the

diode

switch

which,

dictated

switch

driver

unit

connects

the

time-base

signal

the

signal

from

channel

to:

the

X-output

amplifier

which

feeds

the

signal

the

X-deflection

plates

the

c.r.t.

DIODE

SWITCH

The

diode

switch

part

the

horizontal

well

the

vertical

path

and

can,

together

with

the

switch

driver,

accomplish

the

following

situations.

Channel

connected

the

output

amplifier

and

the

sawtooth

voltage

from

unit

fed

the

X-ampilifier.

Channels

and

are

turns

connected

the

out-

put

amplifier

for

approx.

1000

(position

CHOPPED).

The

sawtooth

voltage

from

unit

connected

the

X-amplifier.

Channels

and

are

alternately

connected

the

output

amplifier

every

fly-back

the

time-base

sweep

(position

ALTERNATE).

The

sawtooth

voltage

from

unit

fed

the

X-amplifier.

Channel

connected

the

output

amplifier

and

channel

the

output

amplifier

(position

X-Y).

this

position

the

bandwidth

limited

the

output

amplifier.

The

bandwidths

the

two

channels

vertical

and

horizontal)

are

now

the

same

MHz

phase

difference

2°),

Channel

connected

the

output

amplifier,

the

sawtooth

voltage

from

unit

fed

the

X-amplifier.

SWITCH

DRIVER

The

switch

driver

unit

consists

the

following

parts.

push-button

switch,

which

enables

the

switching

the

positions

described

above.

blocking

oscillator

which

oscillates

frequency

about

MHz,

position

CHOPPED.

position

ALTERNATE

the

blocking

oscillator

triggered

the

alternate

pulse.

Triggering

such

that

the

oscillator

supplies

pulse

every

fly-back

the

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